package com.ts.ischool.ui.interceptor;import org.zkoss.zk.ui.Executions;import org.zkoss.zk.ui.Session;import org.zkoss.zk.ui.util.RequestInterceptor;import com.ts.ischool.pojo.UserBean;public class UserLoginInterceptor implements RequestInterceptor {	@Override	public void request(Session sess, Object request, Object response) {				UserBean user = (UserBean)sess.getAttribute("loginUserInfo");				if (user == null) {			//Executions.sendRedirect("/welcome.zul");		}			}}